Vibratory screen



F'. H. HASLQVV T @L VIBRATORY SCREEN Filed Aug. 25, 1928 Sheets-Sheet l e@ @WM Dectev 2, 1930.

F. H. HASELOW ET AL.

VIBRATORY SCREEN Dec. 2, 1930.

Filed Aug. 25, '1928 4'Sheets-Sheet 2 Dec, 2, 1930. F. H. HAsELowf-ET A1. '1,783,617

VIBRATORY SCREEN Filed Aug. 25, 1928 4 Sheets-Sheet 5 Dec. 2, 1930. F. H. HASELOW E? Al.. 1,783,617

VIBRATORY SCREEN Filed Aug. 25, 1928 A{Sheets-Sheet 4 Patented Dec. 2, 1930 FREDERICK I-I.' HASELOTV AND CHARLES REDIG, 0F MILWAUKEE, WISCONSIN VIBRATORY SCREEN Application led August 25, 1928. Serial No. 302,010.

This invent-ion relates to vibratory screens. Objects of this invention are to provide a vibratory screen which is sopconstructed that the device will separate sand, or other material, into several different grades simultaneously and in a rapid and effective manner, and in which the rate of travel of the material across the screen can be very readily controlled by a simple and easily accessible means. 4 l

Further objects are to provide a vibratory screen, in which the screen sheets may be readily removed, and as readily locked inV place, and in which cam means are provided 1`5 for locking the screen in place so that all portions of the opposite edges of the screen sheets arerigidly and securely clamped in place.

Further objects are to provide a vibratory screen vin which means for adjusting the height of eitherend ofthe screen independently of fthe other is provided so VAthat the angularity of the vibratory screens can be controlled and adjusted as required, and in j j whichmeans are provided for supporting the vibratory memberso as to secure 'maximum vibratory action for the device.

Embodiments of the invention vareshown in the-accompanying drawings, lin which:

Figure 1 is a longitudinal sectional view '30 throughthe device.

Figure 2 is a side elevation with parts broken away. Y j y Figure 3 isa transverse sectional I the line 3-3 offFi'gure 2. j Y

Figure4 is a transverse'sjectional view on the line 4-'4 of Figure 2.

view on Figure 5 is a plan view of the vibratory member. y M,

Figureris a sectional detail view;show1ng a modification.

Y Figure 7 `is an end view ofthe structure l shown in Figure ,6. Y i v Referring to thefdrawi'ngs, it will be seen that the device comprises a base 1 from which astandard l2 rises. The base is pro-V vided :Witha pair of angular guides 3 upon which inverted V'-'shaped slides 4 arecarrie'd. These slides are held down tothe guides `by means of ropesor cables 5, which pass over the pulley 6 and are drawn toward each other by means of tension springs 7.

Each slide 4 pivotally carries a rocking rod 8. These rocking rods pass through projecting trunnions 9 which are secured to a 5-5 transverse rod 10 passing `through the vibratory member 11. This vibratory member is of rectangular contour and is opened at'its rear end and open at its top and bottom. It is closed at its forward end by means of rthe front plate V12 and adjacent its `forward end is yprovided Vwith, a hopper 13 into which the material tobe separated is dumped.

The trunnions or bearings 9 are freely slidable upon the rods 8. The rods 8 are prefer; '65 ably formed of pipe or tubular material, and are provided with end caps 14. Springs 15 and 16 are positioned 'on opposite sides of the trunnionshQ, as 'may be seen from Figures 2 andr These lsprings thus yieldingly sup- 70 port the trunnions,'and the trunnions in turn support the rectangular vibratory member.

Theposition of lthe slides 4 is 'controlled by lmeans 'ofthe levers 17 which are provided with Ltoothed lower portions 18 with which 75 spring-urged pawls '19 areadapted 'to cooperate to loclzthe 'levers in any adjusted posin tion. .These/levers 17 are connected by means of links 20w`iththe slides 4, so that the slides may be v`independently adjusted along the S0' guides 3to thus vary the angularity of the vibratory member, and consequently tovary therrate of 'travel of the 4material across the screens. y Y

The vibratoryrmeniber is provided with an inturned bottoni liange21'on opposite sides and with an L-iron 22 providing a ange spaced above vthe bottom 'lia-nge 'and adapt ed to carry the upper screenmember 23. The x lower screen 24`is carried by the bottom flange 90 21. This construction is shown most clearly `in Figures 'l and 3. Each of the screens is locked in place Vby means of the L-shaped cam operated angle irons 25. These angle irons25 are provided with cam slots 26 which 95"* cooperate with pins 27 and force :the locking angle irons 25 down into Contact witli'the applicants drawing.

means of rods 28 to a small cross head or voke 29. This member 29 is drawn outwardly by means of a spring 30 whose tension is controlled by means of a rope or cable 3l. The cable 3l passes over a pulley 32 (sce Figure 2) and passes to a shaft 33 which may be adjusted as required. This shaft is provided with d 11ams at opposite sides and indicated by the reference character 34 in figure 4. Further, the shaft is provided with a ratchet wheel 35 adapted to be locked in adjusted position by means of the pawl 36.

The screens, it will be seen, are removably locked by means of the locking plates strips, which hold them against the in- ;.ed flanges. Any number of screens of r dually varying mesh may be employed, cpending on the number of grades into wniclr the material is to be separated.

l't is apparent that the sand, or other material, might collect upon the locking flanges or members 25 and thus may ride to the outer portion of the vibratory member without being sorted by means of the screens. This is apparent from an inspection of Figure 5 of However, this defect is avoided by providing outwardly slanting, rearwardly directed fins or strips 37 at regular intervals along the members 25 so as to force the rearwardly traveling sand outwardly from the locking strips 25. Thus all of the sand is caused to travel across the screens and none of it can travel outwardly without passing over the screens.

Means for oscillating the vibratory member will now be described. The standard 2, as may be seen from Figure l, carries a driving shaft 38, which is provided with an eccentric 39. This eccentric carries an anti-friction ring 40 which is supported by a ball bearing, as shown in Figure l, and this ring contacts with a similar ring 41 carried by the plunger 42. Tn other words, the ring 4l constitutes a cam follower and the ring 40 constitutes a cam, together with the eccentric 39. The plunger 42 is slidably guided by means of the projecting sleeve 43 which is formed integrally with the head 44 which houses the eccentric and the anti-friction follower 4l. Preferably a key 45 is provided for the plunger 42 to prevent it from turning.

The plunger is equipped with a recess at its outer end within which is carried a steel ball 46. This ball bears against a wear plate 47 carried by the front wall 12 of the vibratory member, as is apparent from Figure 4. The springs 30, which have been previously described, serve the additional function of urging the vibratory member towards the cam or eccentric, and thus serve to quickly return the vibratory member after it has been displaced by the eccentric.

In operation the driving shaft 38 is rapidly rotated in any suitable manner, as by means of the pulley 48 (see Figure 4) and the vibratory member rapidly oscillates back and forth through a limited distance, the angularity of the vibratory member being readily changed by adjusting the position of the slides 40 previously described, and consequently the rate of travel of the material across the screens may be varied.

Further, the material is simultaneously separated into different grades during its passage through the vibratory member.

While only two screens have been shown, it is apparent that any number may be employed.

A modified form of cam follower, or eccentric follower, is illustrated in Figures 6 and 7. These figures show a plunger 49 which is guided in a bushing 50 bolted to the head 44', such head corresponding essentially to the head 44 previously described. This flange is provided with a slotted end which carries a pulley 5l. This pulley rides between the lugs 52 which project inwardly from the bushings 50 and it is thus prevented from turning. The bushing 50 carries an extension tubular portion 53 which guides the rod 54. The rod 54 extends to the vibratory member.

It will be seen that a very simple, serviceable type of vibratory screen has been provided, which is adapted to separate material into a number of different grades, by the simultaneous operation of several screens. It will be seen further that the rate of travel of the material may be very easily controlled.

It has been found in screens, as previously constructed, that a great amount of work is required to remove the screen. However, with this construction it is merely necessary to relieve the tension of the springs` 30 and thereafter draw the cam members or locking strips 25 rearwardly of the vibratory member. This immediately releases the screens and they may be slid rearwardly from the vibratory member and new ones substituted with the utmost ease and with scarcely any loss of time.

Although the invention has been described in considerable detail, such description is intended as illustrative rather than limiting as the invention may be variously embodied and as the scope of such invention is to be determined as claimed.

1. A vibratory screen comprising an open bottom rectangular member having an open rear end and a closed forward end, said member having inturned flanges, a screen resting upon said flanges, locking strips positioned above the edges of said screen and binding said screen against said flanges, said locking strips having cam means for forcing such strips into contact with said screen when said strips are moved forwardly, a base, means extending from said base and pivotal- 1y supporting said member, a h-ead extending upwardly from said base, spring means interposed between said head and said strips and urging said strip toward locking position and 5 urging said vibratory member towards said head, and eccentric means carried by saidv head for rapidly oscillating said memberq 2. A. vibratory screen comprising a rectangular member movably supported and open at its bottom' and rear and provided with entrance means at its forward end, said vibratory member having forwardly directed flanges, a screen carried by said flanges, lock* ing strips for forcing said screen into contact with said flanges and extending longitudinally along the edges of said screen, said locking strips having outwardly and rearwardly extending deflecting strips secured thereto for forcing the material from said strips on to said screen.

In testimony that we claim the foregoing We have hereunto set our hands at Milwaukee, in the county of Milwaukee and State of lVisconsin. FREDERICK H. HASELOW. CHARLES REDIG. 

